Afraid of the heat..................

[Dchristie]

BTW - The same language is present in my 700B manual so as Joe indicates, Phase Linear was obviously stating some operating characteristics regarding the amplifier temperature that just were not technically factual or supportive.

 

[Gepetto]

Absolute maximum on the much better MJ series of transistors is 200C AT THE TRANSISTOR JUNCTION. That means a lot lower at the transistor case and heat sinks.

That "over 200C" is just bad information.

Just saying guys...

Data sheet attached. Absolute Max junction temp is 150C.

 

[laatsch55]

BTW - The same language is present in my 700B manual so as Joe indicates, Phase Linear was obviously stating some operating characteristics regarding the amplifier temperature that just were not technically factual or supportive.

Deception in audio?????????????? Oh MY GOODNESS!!!!!

 

[Gepetto]

Deception in audio?????????????? Oh MY GOODNESS!!!!!

Shocking!!

 

[laatsch55]

Indeed Joe!!!!! We should get the word out NOWWWWWWWWWWWWW!!!!!!!!!!!!!!!!!!!!

 

[Fishoz]

Sarcastic bitches....

Pretty round about way of letting frankmarsi know that he may have a problem....but we got there.

 

[WOPL Sniffer]

Yeah but they are HERMETCALLY SEALED......... Aint that some crazy shit???

All this from an amp heating up 10 degrees more than another???

Lets go back to the bar.

 

[Gepetto]

Yeah but they are HERMETCALLY SEALED......... Aint that some crazy shit???

All this from an amp heating up 10 degrees more than another???

Lets go back to the bar.

i am sure that Lee can reach out to the PL Guru

 

[marcok]

Orange ,
look here .
http://www.audioholics.com/news/a-tribute-to-roy-f.-allison
The sound of Model One is wonderful when they are powered in the right way ( PL 700 / PL 4000 ) .
They are very hungry of power , but ....

Ciao
Marco

 

[laatsch55]

i am sure that Lee can reach out to the PL Guru

The one that swore the "buzz" was inherent in the design????

 

[laatsch55]

Sarcastic bitches....

Why thank you Fishes, I resemble that remark.....

 

[Gepetto]

The one that swore the "buzz" was inherent in the design????

yes, that one Lee.

 

[laatsch55]

Oh yeah, got his number on speed dial....

 

[marcok]

The real value is 90° C +/- 5° C .
See service manual to verify .
This is a normal value .
Generally now the value ( for safety reason ) should be 80 °C max and
it's assumed that the junction temp is 140 ° C max .
Ciao
Marco
Ps: a curiosity .
How many watts Pl 400 can deliver on 4 Ohm resistive load ?
Phase does not declare this value , but since Infinity RS have 4 Ohm nominal impedance ,
I would like to know it.

 

[laatsch55]

When I test this 400 of Aldo's we'll find out. When testing some copper heatsinks I couldn't keep 5 amp fuses in it above 150 watts into 4 ohms....

 

[marcok]

Thank you Lee.
Plausible value with 5A fuses .
Anyway there are no problems to drive Infinity RSiii .
Ciao
Marco

 

[frankmarsi]

9-13-16


So, was an answer put forth or did I miss something?
At this point it's still not clear to me with everything concerning my apparent heat problem.


Was I over-reacting, maybe worrying too much?
Was I supposed to bring the ‘bo’ and brew to this party? No one told me to.
Should I just start using hot ice and place some on the heat sinks like the concert crews did?
Is it because I’m from NJ and no one ever did like Snookie?
Is it because I have two pairs of AR-LST speakers? I was with holding information, I own three pairs.
Does everyone want me to start purchasing the modifying kits?
Was there an entrance fee I missed?
Was it because I started talking to Don I. before he actually made the DC interrupter?
Is it because I still have my original PL400 amp for over 42 years and would never sell it?
Is this a case of elder abuse?
Maybe because I use MC cartridges?
Is it, if can’t take the heat, I should get out of the kitchen?
Are my feet too big? My nose?
Is it because I cut my pony-tail off back in late ’74?
Maybe because I sent my taxes in late?
Don’t tell it’s because I was born in Manhattan.
Is it because I own the rare PL fan shrouds?
Maybe because I drive Fords now, when I used to be a GM man and never cared for Mopars?
Perhaps because I prefer Macs and not Windows machines?
Because I no longer do my own oil changes?
Because I wear black jeans instead of blue jeans?
Because I liked the ‘60s, ‘70s and ‘80s much more compared to the 2000s?
Is it that I rather listen to vinyl because it’s better than CD’s?
Maybe because I stopped playing guitar and switched to electric bass in ’67?
Oh, I know. It’s because I sold my ‘P’ bass and kept my Hofner.
Could it be because I was a Navy man and not a Marine?
Because I believe in sex before marriage?
I got it, it’s because I no longer shave everyday.
Please, someone throw me a line.


The point still exists that the two PL700’s restored by Ed B. don’t become nearly as hot as my newest PL700 amp. I tried operating Ed’s amps without fans and they still won’t become as hot as the newer one with fans going.


I’m not entirely satisfied here with a conclusive or detailed answer.
Was I asking for too much attention regarding my situation?


Do my amps not matter to anyone except me?
FM

 

[WOPL Sniffer]

9-13-16


So, was an answer put forth or did I miss something?
At this point it's still not clear to me with everything concerning my apparent heat problem.


Was I over-reacting, maybe worrying too much?
Was I supposed to bring the ‘bo’ and brew to this party? No one told me to.
Should I just start using hot ice and place some on the heat sinks like the concert crews did?
Is it because I’m from NJ and no one ever did like Snookie?
Is it because I have two pairs of AR-LST speakers?
Does everyone want me to start purchasing the modifying kits?
Was there an entrance fee I missed?
Was it because I started talking to Don I. before he actually made the DC interrupter?
Is it because I still have my original PL400 amp for over 42 years and would never sell it?
Is this a case of elder abuse?
Maybe because I use MC cartridges?
Is it, if can’t take the heat, I should get out of the kitchen?
Are my feet too big? My nose?
Is it because I cut my pony-tail off back in late ’74?
Maybe because I sent my taxes in late?
Don’t tell it’s because I was born in Manhattan.
Is it because I own the rare PL fan shrouds?
Maybe because I drive Fords now, when I used to be a GM man and never cared for Mopars?
Perhaps because I prefer Macs and not Windows machines?
Because I no longer do my own oil changes?
Because I wear black jeans instead of blue jeans?
Because I liked the ‘60s, ‘70s and ‘80s much more compared to the 2000s?
Is it that I rather listen to vinyl because it’s better than CD’s?
Maybe because I stopped playing guitar and switched to electric bass in ’67?
Oh, I know. It’s because I sold my ‘P’ bass and kept my Hofner.
Could it be because I was a Navy man and not a Marine?
Because I believe in sex before marriage?
I got it, it’s because I no longer shave everyday.
Please, someone throw me a line.


The point still exists that the two PL700’s restored by Ed B. don’t become nearly as hot as my newest PL700 amp. I tried operating Ed’s amps without fans and they still won’t become as hot as the newer one with fans going.


I’m not entirely satisfied here with a conclusive or detailed answer.
Was I asking for too much attention regarding my situation?


Do my amps not matter to anyone except me?
FM

Damn man, maybe a midol will keep you and your amp cool. As stated, 15 degrees ain't worth worrying about.

 

[laatsch55]

Frank, Frank, Frank...... I think your amp runs too hot if it's not comparable to Ed's. We can only suggest so many things that it can be, and you state the seller refutes all those things, them you state you don't want to ship it, so what are we supposed to do????

 

[laatsch55]

I can tell you this....if he set the bias with a scope at 4 ohms at 20k, it's way over 400mv, and that can be part of it, but the seller says that's fine....so.....two schools of thought here dad, check bias and check offset, that will eliminate 2 possibilities...